Home / 74,878.37-111,744.48-66,891.20

Finding the Fourth Proportional to 74,878.37, 111,744.48 and 66,891.20

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Solution

The fourth proportional to 74,878.37, 111,744.48 and 66,891.20 is: 99,824.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,878.37 : 111,744.48 = 66,891.20 : x
  2. Step 2: Convert to fraction form
    74,878.37/111,744.48 = 66,891.20/x
  3. Step 3: Cross multiply
    74,878.37x = 111,744.48 × 66,891.20
  4. Step 4: Simplify right side
    74,878.37x = 7,474,722,305.00
  5. Step 5: Solve for x
    x = 7,474,722,305.00/74,878.37
  6. Step 6: Final answer
    x = 99,824.85

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.